The WBC, following “long and extensive” scientific investigations, have formulated a list of products that they know are at risk of contamination. From February, every boxer who is enrolled in the Clean Boxing Program – and to be ranked in the top 15 by the WBC, enrolment is mandatory – will be informed of those supplements at risk. Therefore, says Sulaiman, there can be no excuses when a performance-enhancing drugs test is failed.